On Sun, 30 Nov 2008, Mattias Pantzare wrote: >> >> Another big difference I have heard about is that Solaris 10 on x86 only >> uses something like 64MB of filesystem caching by default for UFS. This is >> different than SPARC where the caching is allowed to grow. I am not sure if >> OpenSolaris maintains this arbitrary limit for x86. > > That is not true. I doubt that any Solaris version had that type of limit.
What is what I heard Jim Mauro tell us. I recall feeling a bit disturbed when I heard it. If it is true, perhaps it applies only to x86 32 bits, which has obvious memory restrictions. I recall that he showed this parameter via DTrace. However on my Solaris 10U5 AMD64 system I see this limit: 429293568 maximum memory allowed in buffer cache (bufhwm) which seems much higher than 64MB. The "Solaris Tuning And Tools" book says that by default the buffer cache is allowed to grow to 2% of physical memory. Obtain the value via sysdef | grep bufhwm My 32-bit Belenix system running under VirtualBox with 2GB allocated to the VM reports a value of 41,762,816. Bob ====================================== Bob Friesenhahn [EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
